Driving and recording mechanism for calipering devices



1952 P. E. CHANEY ETAL DRIVING AND RECORDING MECHANISM FOR CALIPERING DEVICES 3 Sheets-Sheet 1 Filed Oct. 26, 1945 29 //VVA 70/P BESfOR E: czanc Way/ 6 1 7553027786 7 74.7 7' 0 V5 3 Sheets-Sheet 2 P. E. CHANEY ET AL DRIVING AND RECORDING MECHANISM FOR CALIPERING DEVICES //1HIL I Oct. 28, 1952 Filed Oct. 26, 1945 /m s/yroms l resz ozz E (5547 W517; dig E fiarn es 4rI0/PMEY6.

Oct. 28, 1952 P. E. CHANEY ET AL DRIVING AND RECORDING MECHANISM FOR CALIPERING DEVICES Filed Oct. 26, 1945 l W l H FT w G I: I II 43 4 I I I F768. f;

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W r1112 III/A 3 Sheets-Sheet 3 Patented Oct. 28, 1952 UNITED. STATES. PATENT OFFICE Application October 26, 1945, SerialNo. 624,813-

This invention relates to calipering devicesformeasuring and recording variations ofinternal surface configurations, such as theinternai-diameters ofoil Well tubing or the like and moreparticularly to a self-contained mechanically driven recording mechanism to be used in suchcaliper ing devices.

his a principalobject of this invention toprovide a calipering device of the type employing a stylus which is operated in response to-internal' variations of the tubing being examined which 1 cooperates with a recording cylinder inamannor to produce a continuous or spiral-record. Another object is tocontrol the relative movements ofthe stylusa-nd recording cylinder which efiects the continuous record in such-manner that the record produced will give a true indication ofthe surface condition of a tubing being oaliperiod.

It is also an object of this invention to provide a driving mechanism for the recording cylinder which'insures that it will be rotated and simultaneously moved axially in one direction only in order'to provide an accurate record of the condition of the tubing.

Another object ofthis invent-ion 'is to provide simplified mechanical driving meansior rotating and axially moving a recording cylindrical chart relative to a stylus point in responseto movementof the driving means-througha tube or-pipe which is; being examined.-

Further objects and advantagesof the invention will be apparent by reference to the-following specification and drawings, in which? Figure 1 is a longitudinal section of one end of the device containing one formof drivingmechanism.

Figure 2is a side elevation of a detail of parts of Figure-l.

Figure 3 is a transverse section on theline 3-3 of Figure '2.

Figure 4 is a longitudinal broken seotion in continuation of Figure 1.

Figure 5 is a transverse section on the line 5-5 of- Figure 4.

Figure 6 is a longitudinal section in continuation-of- Figure 4 showing the recording cylinder together'withassociated stylus actuating mocha-- nism:

Figure 7 is a transverse section on line oi- Figure 6.

Figure 8 is an elevational view showing parts of a modified form of driving mechanism.

Fi ure 9 is, a detai o vvFi u ve Figure 10 is a view takenonthe line l0l0 of Figure 8.

Figure-l1 isla view takenlvonthe line I |-rl of Figure 8.

Figure 12.. isga view. taken. on the line Figure 8;

Figure .l3.is a view taken. on the: line l 3-l3 of Figure 8.

I 251 2; of

Thelcalipering devicegof this invention is com prised generally of. anelongated housin containing at one end, which. may be consid red either the. lower end' portionlor uppcrend; portion, ofr the; device, the-driving mechanism; as

shown in Figurel for, actuatingithe recording chart. operating-mechanism which is mounted generally. in thecentral. portion. of; the housing as showninlFigure iuand whichz in turn coope crates, with the. stylus and feeler mechanism located in the. other end; pontiomofthe hQllsing as shown, inFigure. 6. To one endof;,the device maybe connected: a solidgsteell line (not shown) of a small. diameter'lfor lowering the assembly into the well tubing. Sinoethe deviceis particularly adapted, for. .caliperingt tubing under, high pressure theluse-of a thin wireline permits the tubr, ing to besecurely. packed atdts inlet end, for" egample; by.- the. uselof conventional; p acking, rings. As. the assembly is raised or lowered into ,theiwell tubing, the driving mechanismat .one. end-1P0 tion engages the tubing: inner walls andoperates. mechanism .for' rotating a recording chart while as the indicators or stylusv actuators at: the, other end ofrthe. device; engage-the walls; the. recording stylus is actuated in reciprocation. a. fi ttr h cord f'variations ntheinternal u a e:oi e tubin u der examination, hecQop a im f; the stylus: and; recordin "chart. with. ach ot er is. suchfiha a. spi a r gq lfm vthat n v the bo omed acid c cher 'i rro u ed and chan es in .1 i er al 7 o tvdev rv ssi ns on e i ternalr aeels a e in icated ng a v ations; om a m spiral.- l na 0 S itable. ammi mechani m Q Qd:. 9: C%u ,1 3- ordina t be; r flect d al-r: q t its. th r th Ql nWard p he; u w ncrem nt o e a emb sv siredsg w o r v nt a d u le ,r c d'f pm; ein obta ned f In i ures. of t e draw n s. i t l n itudin ction o onelendlofi the mp etecal ner ns a c d n ce-W ich ntainsl e e et chanism, and the recording stylus, the details, of which are fully described in our co-pending application for Recording Stylus ,Actuating Mechanism, Serial No. 624,812, filed of even date here-. with, now abandoned, and will be. referred'to onlyene a ly thelpre e t pp ica io .-v

The feelers or stylus actuators Ill mountedlon p voted rock r arms; are. p s tion d d a en ne end of a housing and each actuator is independently urged outwardly to its extended position by springs El while the actuators as a group are urged outwardly by spring 2. The movement of the feelers in response to irregularities in internal surface configurations of tubing under examination is translated through the short lever arms it of the rocker arms into axial movement and operates a push rod id controlling the movement of a stylus 55 which effects a record on a recording surface it of the record cylinder it which is rotatable and movable axially of the stylus it. The recording chart will be of the type disclosed in our patent application for Cylindrical Recordthread is on the housing H. The housing H comprises everal tubes which are inter-connected by screw threaded end portions together providing a closure for the entire mechanism and permitting thehousing to be separated into sections for inspection or removal of the various parts enclosed therein. The pitch of the cooperating threads it in this Fig. 6 portion of the housing will determine the spacing between the spiral lines made on therecording chart by the stylus. During the calipering operation the actuators ill heretofore referred to effect reciprocation of the stylus E in accordance with the variation in surface configuration encountered by the actuators i ii within the tubing being examined and the recording chart cylinder ll will be rotated by means hereinafter described, and during its rotation will move axially of the housing H through the cooperating threads on the inner wall of the housing and the end of cylinder ii and thus the record made by the stylus will be in the form of a spiral beginning at one end of the recording chart and ending at its other end with the variations in surface configurations indicated by angular lines which deviate from the spiral.

The driving mechanism for operating the chart is disposed at one end of the housing and for a description of this portion of the apparatus reference is made to Figures 1, 2 and 3 of the drawings. A pair of cooperating wheels 26 and 2i are positioned diametrically opposite on the housing and the wheel 28 is maintained in frictional rotative contact with the inner wall of the tubing to be calipered through the cooperation of wheel 25 which is held in spring pressed rotative relation with the inner wall. A the device is lowered into the tubing to be examined wheel 2i] drives, through suitable gearing, shaft 29 which is fixed to the recording chart cylinder ii and drives the same. The wheel 28 is mounted in a block indicated at 22 which is cut away to receive a portion of the wheel and gear mechanism for actuating the shaft Referring to Figures 2 and 3 for details of the arrangement the wheel 2!? is provided with a shaft 23 rotatably secured in the block 22, and having at one end a worm 2d which cooperates with a gear 25 positioned at onev end of a shaft 25 extending longitudinally through the block 22 and which is provided at its other end with pinion gear 2? which is geared to a spur gear 28 on the shaft 29 which actuates the chart cylinder l'i.

In Figures 4 and 6 are shown details of the connections between the shaft 29 and the chart cylinder ll. The shaft 29 is splined and engages rotatable coupling sleeve 32 at 3 l. Coupling sleeve 32 has a flanged end 33 on which is received the upper flanged end of the chart cylinder l1 and the body portion of the coupling sleeve extends through an opening 36 in the end of cylinder H. A collar 35 is positioned around the end of the coupling sleeve 32 and is provided with a set screw 36 so as to be fixed to and rotatable with the coupling sleeve 32. Rotation of the collar 35 is transmitted to the recording cylinder ll by providing spring loaded plungers 3'! which are received in shallow indentations 38 provided on the upper flanged surface of cylinder ii. It will be seen from the above description that through rotation of splined shaft 29 during normal operation of the calipering device that the cylinder I! will be rotated but when the cylinder has reached its upper limit of movement the clutch mechanism prevents further rotation of the cylinder l7 since the coupling sleeve 32 will rotate freely within the cylinder without affecting rotation of the cylinder.

Aniodified form of driving mechanism is disclosed in Figures 8 to 13 of the drawings and provides an overload release and unidirectional latch arrangement which is is adaptable to be incorporated in the calipering mechanism to efiect rotating of the chart cylinder ii in only one selected direction during movementof the calipering device into or out of the tubing under examination. The chart cylinder ll will be driven in response to the frictionally driven wheel 4E5 which is rotatably mounted on shaft ll secured in one section it of a support block shown at upper end of Fig. 8 while the other section 43 of the support block shown in Fig. 8 directly below section d2 is adapted to receive other elements of the chart cylinder driving mechanism. The sections may be removably secured together through suitable screw connections for insertion into the housing H of the calipering device. A worm M is provided on one end of shaft 41 and is arrangedto mesh with a worm gear 45 shown in detail in'Fig. 9 for rotating a rod is which extends through section it of the support block and has at its other end a pinion il located in a recess in the lower end of section d2. When the sections 52 and it are secured together a spur worm gear is carried by section d3 is positioned in the recess of section if and meshes with pinion gear ill, and a driving shaft 59 extending through section :33 of the support block is rotated through the connections just described. The desired rate of rotation of shaft is can be had by proper selection of the ratios of the several worms and pinion gears.

A collar at is secured to the upper end of a driven shaft ill and receives the lower end of driving shaft is which is spaced from shaft 5! to prevent frictional contact during their relative rotative movement. The end of shaft 691s fluted as shown in Fig. 13 providing shallow grooves 5i therein to receive a pin 53 which extends radially through the coupling to and is spring pressed into the grooves 52 by a spring ring 5d. This arrangement constitutes an overload release mechanism which provides for rotation of shaft til when the shafted is driven through the drive wheel it and during normal operation of the calipering device the shaft M will continue to rotate but in the event of jamming of the device or when the chart has reached its limit of axial or longitudinal movement further rotation of shaft it will be prevented since pin 53 will be forced out of the indentations 52 on the continued rotation of driving shaft 49 and this shaftwill merely rotate within the collar 50 and the collar will become stationary.

It will be understood that the shaft is connected to rotate the chart chamber I7 and in order to provide for unidirectional rotation of the chamber or cylinder H the coupling 50 is provided with a series of notches 55 on its outer periphery which are adapted to receive a spring calipering and recording device can be inserted into the tubing to be examined and the pawl 58 will prevent rotation of coupling 50 which in turn will force the pin 53 out of the grooves 52 on the shaft 49 and this shaft will rotate freely within the coupling 50 and the record cylinder will not be rotated during the insertion of the evice into tubing which is to be calipered.

The overload release and latch mechanism is particularly important since the complete calipering and recording mechanism can be lowered into tubing of great depths without actuating the chart and when the calipering device is being raised through the tubing the drive wheel will rotate in a direction opposite to that which it rotated as it entered the tubing and the coupling will then rotate in the direction permitted by the latch mechanism, and the shaft 51 will be driven to operate the chart cylinder. In this manner the calipering device can be made to record only when the device is being moved in an upward direction.

It will be seen that any selected sections of the well tubing can be examined. For example, the device could be lowered to the one thousand foot depth without operating the recording mechanism and then could be brought to the surface to effect the recording. By proper selection of the cooperating threads which permit rotation and axial movement of the chart cylinder or chamber the chart would be provided with a record of the condition of the tubing from the one thousand foot depth up to the surface. Likewise, one thousand foot sections of tubing below the one thousand foot level could be examined and recordings of these sections made on the chart. Thus a complete examination and recording of the condition of wells of any depth can be made.

A second coupling member 60 is provided between shaft 5| and chart drive shaft 29. This coupling can be arranged to function in a manner similar to the overload release arrangement above described in connection with coupling 50. When coupling 60 i arranged to function in a manner similar to coupling member 50 it will permit rotation of the chart chamber 11, after a. calipering operation has been made, in a direction opposite to that which it had during the recording operation so that the chart chamber can be manually returned to its original starting position ready for another calipering and recording operation.

Having described our invention, what we claim and desire to protect by Letters Patent is:

In an internal tube wall calipering and recording device adapted to be passaged through an extended length of tubing and comprising an elongated housing carrying recording means including a recorder member and a stylus member positioned in scribing relation therewith, and driving means for said recording means, the improvement which comprises a drive member carried by said housing and arranged for continuous rotating frictional contact with the tube wall during passage of the device through the tubing, mechanical transmission means including a driving shaft operable by rotation of said drive member in either direction and a driven shaft adapted to effect relative movement of said recorder and stylus members when the device is passaged through the tubing in a calipering direction, one of said shafts being longitudinally fluted, an overload release mechanism connecting said shafts and comprising a collar secured to the other of said shafts and extending around a fluted portion of said one shaft and a spring pressed pin carried by said collar and adapted to enter the flutes to efiect driving engagement between said shafts, and unidirectional latch means located between the overload release connection and said recording means for preventing the driving of said driven shaft when the device is passaged in a,

non-calipering direction.

PRESTON E. CHANEY. WILLIAM E. BARNES.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 222,292 Luders Dec. 2, 1879 236,257 Quimby Jan. 4, 1881 526,383 Dale Sept. 25, 1394 565,695 Smith et a1 Aug. 11, 1896 713,784 Mellor Nov. 18, 1902 1,339,955 Hardel May 11, 1920 1,440,798 Revega Jan. 2, 1923 1,805,343 Robbins May 12, 1931 1,815,672 Jones July 21, 1931 1,837,222 Kannenstine Dec. 22, 1931 1,901,567 Rogatz Mar. 14, 1933 1,938,872 Stone et a1. Dec. 12, 1933 1,951,629 Ross Mar. 20, 1934 2,102,080 Kinley Dec. 14, 1937 2,121,614 Stark June 21, 1938 2,223,913 Johnston Dec. 3, 1940 2,544,609 McMahan Mar. 6, 1951 OTHER REFERENCES PubL: The Oil and Gas Journal, January 6, 1945, pages 46-47. 

